Closure fasteners – Bolt guards
Patent
1991-06-27
1992-02-18
Moore, Richard E.
Closure fasteners
Bolt guards
292340, E05C 2100
Patent
active
050887807
ABSTRACT:
A lock-keeper security shield plate assembly arranged over the usual lock-keeper plate which is in a routed recess of the wooden door jamb lock rail. The reinforcing shield plate is zig-zag shaped having an upset center section and two integrally formed angle face plates, shaped for one said shape to fit all width door frames with door stop rails that also vary in face width. One said face plate defines a bolt opening that is to be aligned with a bolt aperture of an underlying lock-keeper plate of a dead bolt mechanism, the other face plate defines a screw aperture in a key location in relation to a tubular dead bolt lock cylinder assembly mounted on a said door that virtually prevents tampering with the elongated anchor screw driven through said screw hole, through face of stop rail of wood jamb and framing studs there behind, said location of anchor screw in space relation to said lock cylinder rim prevents the removal of said anchor screw (door closed). Other means to protect said screw are shown in several modified drawings.
REFERENCES:
patent: D302937 (1989-08-01), Briggs
patent: 1091453 (1914-03-01), Fletcher
patent: 2631881 (1953-03-01), Trachsler
patent: 3133378 (1964-05-01), Poupitch
patent: 3154343 (1964-10-01), Devine
patent: 3279840 (1966-10-01), Barone
patent: 4383709 (1983-05-01), Ronan
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